Method for acquiring surface heat transfer coefficient of end winding of large-sized synchronous generator stator

A technology of surface heat dissipation coefficient and synchronous generator, which is used in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of high load, serious heating of end windings, and difficulty in determining the surface heat dissipation coefficient of end windings.

Active Publication Date: 2013-07-10
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the end windings of the existing large synchronous generators are getting more and more heated, but the surface heat dissi

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  • Method for acquiring surface heat transfer coefficient of end winding of large-sized synchronous generator stator
  • Method for acquiring surface heat transfer coefficient of end winding of large-sized synchronous generator stator
  • Method for acquiring surface heat transfer coefficient of end winding of large-sized synchronous generator stator

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specific Embodiment approach 1

[0068] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the method for obtaining the surface heat dissipation coefficient of the stator end winding of the large-scale synchronous generator described in this embodiment, it includes the following steps:

[0069] Step 1: Input the parameterized structure data, parameterized boundary condition data and parameterized grid division data of the synchronous generator into the pre-processing module, and after processing by the pre-processing module, respectively generate a two-dimensional fluid system simulation model, a three-dimensional The end electromagnetic field calculation model and the three-dimensional end fluid and heat transfer coupling calculation model; at the same time, assign the drag coefficient and wind area of ​​each branch of the motor in the two-dimensional fluid system simulation model; apply initialization conditions to the three-dimensional end electromagnetic field ca...

specific Embodiment approach 2

[0073] Embodiment 2: This embodiment further describes Embodiment 1. The parameterized structure data described in this embodiment is the structural size of the synchronous generator.

specific Embodiment approach 3

[0074] Embodiment 3: This embodiment further explains Embodiment 1 or 2. The parameterized boundary condition data described in this embodiment is the actual parameter data and the material properties of the structural parts during the operation of the synchronous generator.

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Abstract

The invention relates to a method for acquiring surface heat transfer coefficient of an end winding of a large-sized synchronous generator stator, belongs to the technical field of motors, aims to solve the problems that load of the existing large-sized synchronous generator is increasing so that heating of the end winding of the generator worsens increasingly while the surface heat transfer coefficient of the end winding is difficult to determine. The method includes: acquiring a two-dimensional fluid system simulation model, a three-dimensional end electromagnetic field calculation model and a three-dimensional end fluid and heat transfer coupling calculation model, solving by corresponding solvers to obtain boundary conditions and load of the three-dimensional end electromagnetic field calculation model and transmitting the conditions and load to a three-dimensional end fluid and heat transfer coupling solver; allowing the three-dimensional end fluid and heat transfer coupling solver to calculate to obtain the surface heat transfer coefficient of the stator end winding according to the boundary conditions and load of the three-dimensional end electromagnetic field calculation model and attributes of materials. The method is applicable to calculating the surface heat transfer coefficient of the end winding of the large-sized synchronous generator stator.

Description

technical field [0001] The invention relates to a method for obtaining the heat dissipation coefficient of the surface winding of a stator end part of a large-scale synchronous generator, and belongs to the technical field of motors. Background technique [0002] At present, power generation equipment is mainly composed of large synchronous generators such as thermal power, nuclear power and hydropower. In order to improve the utilization rate of materials and the efficiency of motors, the capacity of large synchronous generators is relatively large. With the increase of single unit capacity, the load of generators is getting higher and higher, which leads to more and more heating of the end windings, which affects the Safe and stable operation of large synchronous generators. Therefore, it is necessary to calculate the temperature rise of the stator end windings in the design of large synchronous generators, and the accuracy of the calculation of the temperature rise of th...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李伟力韩继超张书宽王立坤焦晓霞管春伟霍菲阳
Owner HARBIN UNIV OF SCI & TECH
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